Datasheet

TVP5147M1
www.ti.com SLES140G –JULY 2005–REVISED FEBRUARY 2012
Table 2-62. AFE Coarse Gain for CH 4 Register
Subaddress 49h
Default 20h
7 6 5 4 3 2 1 0
CGAIN 4 [3:0] Reserved
CGAIN 4 [3:0]:
Coarse Gain = 0.5 + (CGAIN 4)/10 where 0 ≤ CGAIN 4 ≤ 15.
This register works only in manual gain control mode. When AGC is active, writing to any value is ignored.
1111 = 2
1110 = 1.9
1101 = 1.8
1100 = 1.7
1011 = 1.6
1010 = 1.5
1001 = 1.4
1000 = 1.3
0111 = 1.2
0110 = 1.1
0101 = 1
0100 = 0.9
0011 = 0.8
0010 = 0.7(default)
0001 = 0.6
0000 = 0.5
Table 2-63. AFE Fine Gain for Pb Register
Subaddress 4Ah–4Bh
Default 900h
Subaddress 7 6 5 4 3 2 1 0
4Ah FGAIN 1 [7:0]
4Bh Reserved FGAIN 1 [11:8]
FGAIN 1 [11:0]:
This fine gain applies to component Pb.
Fine Gain = (1/2048) × FGAIN 1, where 0 ≤ FGAIN 1 ≤ 4095
This register is only updated when the MSB (register 4Bh) is written to.
This register works only in manual gain control mode. When AGC is active, writing to any value is ignored.
1111 1111 1111 = 1.9995
1100 0000 0000 = 1.5
1001 0000 0000 = 1.125 (default)
1000 0000 0000 = 1
0100 0000 0000 = 0.5
0011 1111 1111 to 0000 0000 0000 = Reserved
Copyright © 2005–2012, Texas Instruments Incorporated Functional Description 63
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